RDMS Premium
Specification

The RDMS is the first system worldwide to measure the true cross section of wire rod, bar and tubes with static sensors. Using innovative ideas, RDMS raises the bar in measurement technology. The requirements are always different: The measurement of complete profiles is not necessarily required in all places. Especially for intermediate and feeder sizes, the measurement of one or two diameters is often sufficient. To optimize the finishing rolling with today’s complex requirements, complete profile measurement and un-delayed on-line display of the results is imperative.

With RDMS you can achieve

  1. The true shape of wire rod and most bar shapes such as rounds, squares, flats, and hexagons can be measured.
  2. Optional software extensions for rebar or products that are rolled in 3-roll technology are available.
  3. Not only the main dimensions, ovality and profile are measured; cross rolls, roll eccentricity, roll wear, roll break as well as influence of tensile forces can easily be determined.
  4. Through sophisticated data evaluation with comprehensive graphical displays including trend analysis the operator can quickly take corrective action on imminent tolerance deviations specific and before production is affected.
  5. Run-in times after changes of size or steel grade are cut because there is no more need to sample and mike manually.
  6. The time for adjusting the rolling parameters can be drastically reduced; often the rolling time of the first billet is already sufficient.
  7. The entire rolling train from roughing mill to the cooling bed can be monitored by installing multiple networked systems.
  8. 100% quality control and documentation is ensured by storing of all relevant data.
Features/Benefits

  1. LAP RDMS Premium systems are equipped with 3, 4, or 6 measuring axes and measure the true profile even of asymmetric shapes.
  2. The patented 3-point measurement results in precise OD and out-of-round results of products with 3-lobed shapes as rolled frequently by 3-roll mills.
  3. The real-time software package in modular client/server structure provides the operators with essential information for mill stand and entry guide adjustment.
  4. Using multiple gauge heads along the rolling train, the material can be traced from the roughing mill through the cooling bed to the final quality inspection.
  5. Also, for today’s “one-pass” mill setup, multiple gauge heads provide un-delayed measurement of all finishing sizes without necessity of relocating a gauge head at size changes.
  6. The integrated database archives measurement results, product setup values and system status information over months for later retrieval and analysis.


The Measurement Principle

 

 Multiple Laser micrometers scan the surface of the rolled stock precisely. This reproduces the entire envelope polygon of the object correctly even at very high rolling speeds. The system is equipped with 2, 3, 4, or 6 axes depending on requirements and rolling technology – from simple measurement of width and height to the measurement of the complete profile. Due to the stationary design of the measurement axes each individual measurement produces an undistorted cross section, while rotation of the axes could falsify the measured shape. The true ovality of a round object is thus determined as difference of min, and max, size of the same cross-section. Each measurement supplies a complete profile without any time consuming rotation or oscillation of the system, like it is the case with conventional systems. Even short tolerance violations as frequently occurring on the side (width) of rods/bars are reliably detected and not by chance of an oscillating/rotating system being at the right angle in these unpredictable moments. Flat and square profiles are measured twist-independent based on sophisticated computing methods. With a multi-axis (3 or more) system even asymmetric shapes can be measured precisely. Conventional shadow gauges would fail and suffer drastic measurement errors.


Applications

 

 

High-End system for 'true-shape' profile measurement and for special applications
  1. Wire rod
  2. Bars: round, square, flats, hexagon
  3. Special rolling technologies like 3-roll stands
  4. Profiles with asymmetric fill, rebar
Options

 

  1. Up to 6 independent operator stations
  2. Integration of multiple gauge head via network connectable to external customer SQL data bases
  3. Gauge head swiveling upgrade for angle adjustment of measurement axes


Large Scale Options

Swing
Tiltable measuring frame: Measurement angle and operating modes are software controlled: stationary operation, twist tracking, cyclic or permanent movement.

Rebar
Software module to determine the diameter across the ribs of rebar using an intelligent filter algorithm. Depending on the rebar size and type, also core diameter and rib height can be measured and the weight per length computed.
 
Kocks
System expansion for 3-roll-reducing/sizing technology. A system with 3 or 6 axes in combination with specific software ensures the precise measurement of contour and ovality using the patented 3-pointmethod (US Patent 6,549,293 B2, German Patent 100 23172.1). Asymmetric contours and 3-lobed shapes are detected and measured precisely.
 
Database
Advanced archiving of dimensions and relevant process data using a powerful SQL data base. Depth and duration of the data storage can be easily selected by adjusting parameters.